The New Sudoku Players' Forum

by ab » Sun Jul 02, 2006 2:22 pm

This thread is a sequel/homage to the superior puzzles thread. In that thread puzzles had to be solvable using hidden and naked sets up to triples, locked candidates and x wings and to qualify as superior they had to require triples or x wings from that list.

I suggest adding quads to complete the hidden and naked sets and also extending the idea of x wings to include swordfih and jellyfish. So to qualify as a superior plus puzzle a puzzle must be solved by hidden and naked sets up to quads, locked candidates, x wings, swordfish and jellyfish and must require one of the following techniques from that list: hidden or naked quads, swordfish or jellyfish.

Since we're extending the list of solving techniques, maybe we could also extend the list of acceptable symmetries to include puzzles whose symmetry is simply one line of symmetry, whether horizontal, vertical or diagonal. I'm open to feedback on this issue.

Here's some puzzles to start the list off:

Code: Select all: puzzle #1 (ab) . . . | . . . | . . . . . 8 | 7 . 6 | 1 . . . 3 2 | 1 . 5 | 9 4 . ------+-------+------ . . 9 | 8 . 3 | . 2 . . . . | . . . | . . . . 4 . | 9 . 1 | 3 . . ------+-------+------ . 1 7 | 3 . 8 | 5 9 . . . 3 | 6 . 7 | 8 . . . . . | . . . | . . . puzzle #2 (ab) 8 . . | 5 . . | . . 9 . . . | . 6 . | 4 . . . 6 3 | 2 . . | 5 . . ------+-------+------ . . . | . . . | 3 . 8 . 2 . | . . . | . 6 . 9 . 5 | . . . | . . . ------+-------+------ . . 8 | . . 1 | 9 2 . . . 9 | . 8 . | . . . 7 . . | . . 9 | . . 4 puzzle #3 (ab) . . . | 2 . . | . . . . 3 6 | 5 . 8 | . . . 1 . 8 | . 6 . | . 7 . ------+-------+------ . . . | . . 6 | 4 . . 9 . . | . . . | . . 5 . . 5 | 8 . . | . . . ------+-------+------ . 9 . | . 4 . | 7 . 3 . . . | 7 . 1 | 8 6 . . . . | . . 9 | . . . puzzle #4 (RedEd) . . . | . . . | . 1 . 2 1 . | . . 3 | 4 8 . . 3 9 | 8 . . | 2 . . ------+-------+------ . 6 . | 3 . 4 | 9 . . . . . | . . . | . . . . . 1 | 6 . 7 | . 4 . ------+-------+------ . . 8 | . . 2 | 1 7 . . 2 6 | 7 . . | . 9 8 . 9 . | . . . | . . . puzzle #5 (gsf) . . 1 | . . 7 | . . . . 6 8 | . 1 . | . . . 4 . . | 6 . . | . . . ------+-------+------ . . 4 | 7 8 . | . . 9 6 7 . | . . 3 | . 2 . . . 5 | . . 2 | 4 . . ------+-------+------ . . . | 9 . 8 | . 5 1 . . . | . 3 . | . 8 . . . . | . 6 . | 2 . . puzzle #6 (gsf) 2 . 4 | 5 8 . | . . . . . 3 | . 4 . | . . . . 9 . | 1 . 6 | . . . ------+-------+------ . . . | 3 9 . | 2 . . . . . | . . 2 | . 8 5 8 1 . | . . 5 | 3 . 4 ------+-------+------ . . . | . . . | . 5 6 . . . | 7 . . | 1 . . 5 . . | 8 . . | . . 2 puzzle #7 (gsf) . . 8 | . . . | . . . . . . | . . . | 5 . 3 3 . . | 4 7 . | 2 . 6 ------+-------+------ . . 4 | 8 . 9 | . . . . . 1 | . . 6 | 3 9 . . . . | 2 4 . | . . . ------+-------+------ . 8 5 | . 2 . | . 3 . . . . | . 9 . | 4 . 7 . 4 6 | . . . | . 5 . puzzle #8 (Ocean) 1 . . | . . . | . . . . . . | . 2 3 | 4 . . . . . | 5 4 . | . 6 . ------+-------+------ . . 3 | . . 5 | . 2 . . 7 8 | . . . | 5 3 . . 4 . | 6 . . | 9 . . ------+-------+------ . 8 . | . 6 2 | . . . . . 2 | 9 5 . | . . . . . . | . . . | . . 7 puzzle #9 (Ocean) . . . | 1 . . | . 2 . . . 3 | . 4 5 | . . 6 . 4 . | . 7 . | . . . ------+-------+------ 2 . . | . . . | . 8 . . 8 7 | . . . | 4 5 . . 9 . | . . . | . . 1 ------+-------+------ . . . | . 5 . | . 3 . 9 . . | 7 3 . | 8 . . . 1 . | . . 8 | . . . puzzle #10 (Ocean) . . . | . . 8 | 1 3 . . 4 1 | . . 6 | 2 . . . 5 . | . . . | 4 . . ------+-------+------ . . . | . . . | . 8 . . . 4 | 6 . 5 | 7 . . . 7 . | . . . | . . . ------+-------+------ . . 3 | . . . | . 7 . . . 5 | 1 . . | 8 9 . . 1 6 | 9 . . | . . . puzzle #11 (Ocean) . . . | . . 1 | . . . . . . | . 2 . | 3 4 . . . . | 5 . . | . 1 6 ------+-------+------ . . 7 | . . . | 8 . . . 2 . | . . 6 | . . 5 8 . . | . 3 . | 7 . . ------+-------+------ . 6 . | 4 . 2 | . . . . 5 2 | . . . | . . 8 . . 9 | . 5 . | . 3 . puzzle #12 (Ocean) . 2 . | 6 . . | . . . . . . | 9 . 1 | . . 8 . . 3 | . 4 . | 1 . . ------+-------+------ . 7 . | . . . | . 6 4 . . 8 | . . . | 2 . . 5 3 . | . . . | . 7 . ------+-------+------ . . 9 | . 1 . | 7 . . 8 . . | 3 . 5 | . . . . . . | . . 2 | . 5 . puzzle #13 (Ocean) 4 1 . | . 9 . | 8 . 3 . . . | . 2 . | . . 5 7 . . | 6 . . | . . . ------+-------+------ . . . | . . . | 9 . . 9 2 . | . . . | . 8 1 . . 5 | . . . | . . . ------+-------+------ . . . | . . 5 | . . 4 3 . . | . 1 . | . . . 5 . 7 | . 3 . | . 2 9 puzzle #14 (Ocean) . . . | . . . | . . . . 4 . | . . . | . 1 . . . 9 | 2 . 6 | 3 . . ------+-------+------ . . 6 | . 1 . | 7 . . . . . | 4 . 5 | . . . . . 7 | . 3 . | 2 . . ------+-------+------ . . 2 | 7 . 9 | 6 . . . 3 . | . . . | . 5 . . . . | . . . | . . . puzzle #15 (Ocean) . . . | . . . | . . . . 1 . | . . . | . 2 . . . 3 | 4 . 5 | 6 . . ------+-------+------ . . 4 | . 1 . | 3 . . . . . | 7 . 8 | . . . . . 6 | . 9 . | 5 . . ------+-------+------ . . 2 | 5 . 6 | 4 . . . 7 . | . . . | . 9 . . . . | . . . | . . . puzzle #16 (Ocean) . . . | . . . | . . . . 1 . | . . . | . 2 . . . 3 | 4 . 5 | 6 . . ------+-------+------ . . 4 | . 1 . | 5 . . . . . | 2 . 7 | . . . . . 8 | . 6 . | 3 . . ------+-------+------ . . 6 | 3 . 4 | 8 . . . 7 . | . . . | . 9 . . . . | . . . | . . . puzzle #17 (Ocean) . . . | . . . | . . . . . . | 1 . 2 | 3 . . 4 5 . | . . . | . 6 1 ------+-------+------ . 4 . | . . . | . 1 . . . . | 2 . 7 | . . . . 6 . | . . . | . 8 . ------+-------+------ 9 1 . | . . . | . 4 6 . . 7 | 3 . 8 | . . . . . . | . . . | . . . puzzle #18 (Ocean) . . 1 | . 2 3 | . . 4 . . . | . . 5 | . . . 6 . . | . . . | 7 . . ------+-------+------ . . . | . . . | . 1 3 7 . . | . . . | . . 6 8 9 . | . . . | . . . ------+-------+------ . . 5 | . . . | . . 7 . . . | 4 . . | . . . 1 . . | 7 9 . | 4 . . puzzle #19 (Ocean) . . . | 2 . 8 | 6 . . . 4 . | . . . | . 1 . 9 . . | . 3 . | . . . ------+-------+------ 4 . . | 7 . 9 | . . 6 . . 6 | . . . | 5 . . 2 . . | 1 . 3 | . . 4 ------+-------+------ . . . | . 2 . | . . 7 . 5 . | . . . | . 6 . . . 2 | 3 . 7 | . . . puzzle #20 (Ocean) . . 7 | . . . | 4 3 . 2 . . | . . 8 | . . . 3 . . | . 5 . | . . 2 ------+-------+------ . 7 . | . 4 . | . . . . . 8 | 5 . 6 | 7 . . . . . | . 3 . | . 5 . ------+-------+------ 9 . . | . 2 . | . . 8 . . . | 4 . . | . . 3 . 6 2 | . . . | 1 . . puzzle #21 (Ocean) 3 4 . | . 5 . | . . 9 . . 5 | . . . | . . 6 . . 2 | . . . | 8 7 . ------+-------+------ . . . | 3 . 4 | . . . 7 . . | . . . | . . 4 . . . | 1 . 6 | . . . ------+-------+------ . 8 3 | . . . | 2 . . 6 . . | . . . | 4 . . 9 . . | . 2 . | . 1 3 puzzle #22 (gsf) 8 . 3 | . 2 . | 7 . . 1 . 6 | 7 8 . | 9 . . . . . | . . 3 | . . . ------+-------+------ 6 . . | . . . | . 7 . . 7 . | 8 6 . | . 1 . 9 . . | . . . | . 5 . ------+-------+------ . . . | . . 9 | . . . 3 . 9 | 4 7 . | 1 . . 4 . 7 | . 1 . | 6 . . puzzle #23 (gsf) 2 . . | . . 3 | 8 . . . . 8 | 2 . . | . . . 3 . . | 4 . . | 2 . 1 ------+-------+------ . 6 5 | . . . | . . 9 7 2 . | . . . | . . . . 3 . | 5 . . | 4 1 . ------+-------+------ . . . | . . 6 | . 9 . . . . | 9 1 5 | . . . . . . | . 7 . | 5 . 8 puzzle #24 (gsf) 2 . . | . . 3 | 8 . 4 . . 8 | 2 . . | . . . 3 . . | 4 . . | 2 . 1 ------+-------+------ . 6 5 | . . . | . . 9 7 2 . | . . . | . . . . 3 . | . . . | 4 1 . ------+-------+------ . . . | . . 6 | . 9 . . . . | 9 1 5 | . . . . . . | . 7 . | 5 . 8 puzzle #25 (gsf) 1 . . | 9 3 . | . 7 4 . 2 . | . . 7 | . . . . . . | . 1 . | . 8 . ------+-------+------ 9 3 . | . 4 . | 8 . . . 1 . | . . . | . 6 . . . 6 | . 8 . | . 3 9 ------+-------+------ . 7 . | . 6 . | . . . . . . | 5 . . | . 4 . 5 9 . | . 7 1 | . . 6 puzzle #26 (tso) 9 . . | 4 . . | 7 . . . 6 . | . 3 . | . 5 . . . 1 | . . 8 | . . 4 ------+-------+------ 2 . . | 8 . . | 1 . . . 3 . | . 4 . | . 7 . . . 7 | . . 9 | . . 5 ------+-------+------ 5 . . | 6 . . | 2 . . . 2 . | . 8 . | . 9 . . . 6 | . . 1 | . . 3 puzzle #27 (tso) 8 . . | 6 . . | 4 . . . 9 . | . 1 . | . 3 . . . 7 | . . 8 | . . 5 ------+-------+------ 6 . . | 4 . . | 1 . . . 1 . | . 2 . | . 8 . . . 8 | . . 9 | . . 6 ------+-------+------ 5 . . | 9 . . | 2 . . . 6 . | . 3 . | . 7 . . . 4 | . . 5 | . . 3 puzzle #28 (tso) 2 . . | 4 . . | 3 . . . 7 . | . 8 . | . 4 . . . 4 | . . 7 | . . 1 ------+-------+------ 4 . . | 1 . . | 2 . . . 5 . | . 6 . | . 3 . . . 7 | . . 8 | . . 9 ------+-------+------ 5 . . | 8 . . | 7 . . . 6 . | . 5 . | . 9 . . . 1 | . . 9 | . . 6 puzzle #29 (tso) 9 . 3 | 8 . . | . 6 . . . . | 6 . . | . 8 . . . . | . . . | 9 . 5 ------+-------+------ . . 2 | 3 . . | . 5 . 4 . . | . 6 . | . . 1 . 5 . | . . 7 | 8 . . ------+-------+------ 3 . 5 | . . . | . . . . 7 . | . . 3 | . . . . 6 . | . . 1 | 2 . 9 puzzle #30 (tso) . . . | . . 3 | . 6 5 5 . . | 6 . . | 7 2 . . . 6 | . . . | . . 3 ------+-------+------ 2 3 . | . 6 7 | 5 . . . . . | 8 . 4 | . . . . . 8 | 3 2 . | . 9 7 ------+-------+------ 6 . . | . . . | 1 . . . 5 7 | . . 6 | . . 8 3 1 . | 5 . . | . . . puzzle #31 (tso) . . 7 | . . . | . . . 5 3 . | 1 . . | . . 7 9 . 1 | . . . | 5 4 . ------+-------+------ . . . | 6 . 7 | . 3 5 . . 3 | . 5 . | 9 . . 8 6 . | 3 . 4 | . . . ------+-------+------ . 2 8 | . . . | 3 . 9 3 . . | . . 2 | . 7 4 . . . | . . . | 1 . . puzzle #32 (ab) 6 . . | . 9 . | 3 . . . . 7 | . . . | 6 2 . . 2 . | . . . | . 1 5 ------+-------+------ . . . | 5 . 4 | . . . 7 . . | . . . | . . 3 . . . | 1 . 2 | . . . ------+-------+------ 4 1 . | . . . | . 7 . . 3 6 | . . . | 8 . . . . 5 | . 6 . | . . 9 puzzle #33 (RW) 7 . . | . 4 . | . . 6 . 6 . | . . . | . 8 . . . 4 | 3 . 2 | 9 . . ------+-------+------ . . 2 | 9 . 4 | 1 . . 4 . . | . 3 . | . . 9 . . 7 | 6 . 8 | 3 . . ------+-------+------ . . 5 | 1 . 3 | 6 . . . 7 . | . . . | . 1 . 9 . . | . 8 . | . . 4 puzzle #34 (RW) . . . | . . . | . . . 9 . . | 3 . 2 | . . 4 6 4 . | 1 . 8 | . 7 9 ------+-------+------ 7 1 . | . . . | . 2 8 . . 5 | . . . | 7 . . 4 2 . | . . . | . 9 5 ------+-------+------ 1 5 . | 9 . 4 | . 6 2 2 . . | 5 . 6 | . . 1 . . . | . . . | . . . puzzle #35 (RW) . 1 2 | 8 . . | . 3 . 7 . . | 3 . . | . . 1 . . . | . 6 1 | . . 7 ------+-------+------ . . 5 | 7 . 6 | . 1 3 . . 9 | . . . | 7 . . 6 7 . | 1 . 5 | 9 . . ------+-------+------ 5 . . | 4 1 . | . . . 3 . . | . . 9 | . . 2 . 4 . | . . 3 | 1 5 . puzzle #36 (RW) 4 . . | . 2 . | . . 8 . 3 . | . . . | . 5 . 8 . 9 | . 5 . | 1 . 2 ------+-------+------ . . . | 2 9 7 | . . . . . 4 | . . . | 5 . . . . . | 5 1 4 | . . . ------+-------+------ 5 . 8 | . 4 . | 6 . 1 . 1 . | . . . | . 3 . 2 . . | . 6 . | . . 5 puzzle #37 (RW) 6 . . | . 8 . | . . 9 . 1 5 | . . . | 2 8 . . 3 . | . . . | . 4 . ------+-------+------ . . . | 3 2 1 | . . . 2 . . | 4 . 6 | . . 7 . . . | 7 9 8 | . . . ------+-------+------ . 4 . | . . . | . 1 . . 6 2 | . . . | 4 3 . 3 . . | . 4 . | . . 5 puzzle #38 (ab) . . 7 | 2 . 8 | 9 . . . . . | 1 . 3 | . . . . . 2 | . . . | 8 . . ------+-------+------ 2 . . | . . . | . . 4 9 5 . | 7 . 2 | . 1 6 . 1 4 | . . . | 2 8 . ------+-------+------ . 8 . | . . . | . 5 . 4 . . | . . . | . . 2 . . 1 | 9 . 5 | 6 . . puzzle #39 (ab) . 7 6 | 3 . 1 | . 4 . 9 . . | 8 . 7 | . . 5 . . . | . . . | . . 6 ------+-------+------ . 1 . | 6 . 8 | . 3 . . . . | . . . | . . . . 3 . | 9 . 4 | . 7 . ------+-------+------ 2 . . | . . . | . . . 1 . . | 7 . 6 | . . 3 . 8 . | 4 . 2 | 9 6 . puzzle #40 (ab) . . 9 | 5 . . | . . . 7 . . | 9 . . | . 4 . . . 8 | 7 . 3 | 1 . . ------+-------+------ 4 2 5 | . . . | . . . . . . | . . . | . . . . . . | . . . | 7 5 6 ------+-------+------ . . 6 | 8 . 1 | 3 . . . 9 . | . . 6 | . . 1 . . . | . . 4 | 9 . . puzzle #41 (ab) . 3 5 | . . . | 4 8 . 7 . . | 3 . 2 | . . . 1 . . | . . . | . . 9 ------+-------+------ . 4 . | 9 . 1 | . 7 . . . . | . . . | . . . . 1 . | 6 . 3 | . 5 . ------+-------+------ 9 . . | . . . | . . 5 . . . | 8 . 7 | . . 3 . 8 6 | . . . | 7 2 . puzzle #42 (Tarek) 9 3 . | . 2 1 | . 4 7 . . . | . . . | 8 . . 6 . . | . 8 . | . 3 . ------+-------+------ . . . | 2 . . | . 6 . 1 . . | . . . | . . . . 9 . | . . 4 | . . 2 ------+-------+------ . 1 . | . 5 . | . . 3 . . 3 | . . . | . . . 7 4 . | 8 6 . | . 5 1 puzzle #43 (gsf) . 7 . | . 8 . | 4 . . . 4 . | 7 . 2 | . . . 2 . 5 | . 3 . | . . 7 ------+-------+------ . . 8 | . . . | . 1 . . . 6 | . 5 . | 7 . 8 7 9 . | . . . | . 3 . ------+-------+------ 9 . . | . 6 5 | 8 . . . . . | 8 . . | . 7 9 . . 1 | 2 . . | 3 . . puzzle #44 (gsf) . . . | . 4 1 | . . . . 8 . | . 9 . | . . . 2 . 4 | 5 . 3 | . . . ------+-------+------ . . . | . 1 . | 6 . 4 . . . | 9 . 2 | . 5 7 . . . | . 7 . | 1 . . ------+-------+------ 9 6 1 | . . . | 4 . . . . 7 | . . . | . 9 . . . 5 | . . . | 2 . . puzzle #45 (gsf) 2 . . | . 6 . | . . 9 . 1 . | . . . | . 2 . . . 9 | 1 . 8 | 4 . . ------+-------+------ . . 4 | 2 . 7 | 5 . . 5 . . | . 9 . | . . 4 . . 6 | 5 . 1 | 9 . . ------+-------+------ . . 7 | 4 . 2 | 6 . . . 5 . | . . . | . 4 . 9 . . | . 7 . | . . 3 puzzle #46 (gsf) . 4 7 | 5 . 6 | . 9 . 6 . . | . . . | . . 4 1 . 3 | . . . | 5 . 2 ------+-------+------ . . 8 | 6 . 7 | . 3 . . . . | . . . | . . . . . 4 | 9 . 2 | . 5 . ------+-------+------ 4 . 2 | . . . | 8 . 5 5 . . | . . . | . . 3 . 3 6 | 4 . 5 | . 2 . puzzle #47 (ab) 7 . . | . 4 . | . 5 9 . . 3 | 9 . . | 2 . 8 . 2 . | . . . | . 3 . ------+-------+------ . . . | . 8 1 | . . . 3 . . | 6 . 5 | . . 4 . . . | 4 7 . | . . . ------+-------+------ . 4 . | . . . | . 8 . 8 . 1 | . . 9 | 4 . . 9 6 . | . 3 . | . . 7 puzzle #48 (ab) . . . | . 6 . | . . . . . 6 | 7 . 2 | 5 . . . . 9 | 8 . 5 | 1 . . ------+-------+------ . 6 3 | . . . | 8 4 . 8 . . | . . . | . . 3 . 5 7 | . . . | 9 2 . ------+-------+------ . . 8 | 5 . 7 | 3 . . . . 5 | 6 . 9 | 2 . . . . . | . 2 . | . . . puzzle #49 (ab) . . . | . . . | . . . . 3 8 | 9 . 2 | 6 5 . . 5 . | 6 . 4 | . 2 . ------+-------+------ . 9 1 | . . . | 8 7 . . . . | . . . | . . . . 4 5 | . . . | 9 3 . ------+-------+------ . 6 . | 7 . 3 | . 4 . . 7 2 | 5 . 8 | 1 9 . . . . | . . . | . . . puzzle #50 (gsf) . . . | . 4 1 | . . . . 8 . | . 9 . | . . . 2 . 4 | 5 . 3 | . . . ------+-------+------ . . . | . 1 . | 6 . 4 . . . | 9 . 2 | . 5 7 . . . | . 7 . | 1 . . ------+-------+------ 9 6 1 | . . . | 4 . . . . 7 | . . . | . 9 . . . 5 | . . . | 2 . . puzzle #51 (gsf) . . 8 | . . . | . . 7 . 1 . | . . . | 5 . . 9 . . | . . . | . 3 4 ------+-------+------ . . . | . . 2 | . . . . . . | . 3 8 | 4 . . . . . | 9 4 . | 8 2 5 ------+-------+------ . 6 . | . 2 5 | . 1 . . . 2 | . . 3 | 6 . 9 3 . 5 | . . 6 | . 4 . puzzle #52 (gsf) . . 2 | 6 . 3 | . . 8 . . 9 | . . 1 | 2 . . . . . | . 7 . | . 3 . ------+-------+------ 6 . . | . . 8 | 9 . . . 5 . | . . . | . 7 . . . 3 | 7 . . | . . 4 ------+-------+------ . 3 . | . 5 . | . . . . . 5 | 1 . . | 8 . . 2 . . | 9 . 6 | 1 . . puzzle #53 (gsf) . . 3 | . 7 . | 9 . . . . 1 | 5 . 9 | 6 . . 5 . . | 6 . 3 | . . 7 ------+-------+------ . . . | . . . | . . . . 1 8 | . . . | 2 5 . 4 . . | 1 . 5 | . . 9 ------+-------+------ 1 . . | 9 . 6 | . . 4 . . . | . . . | . . . . 5 . | 7 . 1 | . 8 . puzzle #54 (gsf) . 7 . | . 4 . | . . . . . . | . 3 . | . . 5 . . . | 8 . . | 1 . . ------+-------+------ 4 . 3 | . . . | . 2 . . . . | 5 . 1 | 9 . . 6 . . | . . . | . . . ------+-------+------ . 5 . | 9 . . | 7 . . 2 . . | . . . | . 4 . . . . | . . . | . . . puzzle #55 (daj95376) . . . | 7 . 1 | 3 . 8 . 7 . | . . . | 2 1 . . . . | . . 6 | . 9 7 ------+-------+------ . . . | 1 8 . | . . 2 . 9 . | . . . | . 8 . 5 . . | . 6 9 | . . . ------+-------+------ 7 3 . | 2 . . | . . . . 8 1 | . . . | . 2 . 9 . 2 | 8 . 7 | . . . puzzle #56 (daj95376) . . 4 | 5 . 8 | 9 1 6 8 . . | . . 2 | . . . . . 5 | 4 . . | . . . ------+-------+------ . 2 . | 3 . . | 1 . 4 . . . | . . . | . . . 7 . 3 | . . 1 | . 2 . ------+-------+------ . . . | . . 3 | 2 . . . . . | 1 . . | . . 9 6 4 8 | 2 . 9 | 3 . . puzzle #57 (daj95376) . . 6 | . 5 . | . . . . . . | . 2 7 | 8 5 . . 2 . | 9 . . | . . 7 ------+-------+------ 8 . . | 6 . 9 | . 7 . 6 . . | . 4 . | . . 3 . 5 . | 2 . 8 | . . 1 ------+-------+------ 7 . . | . . 2 | . 4 . . 6 5 | 1 9 . | . . . . . . | . 7 . | 1 . . puzzle #58 (daj95376) . . 7 | 1 . . | . . 5 1 5 . | . 2 . | . . . 8 . 2 | 7 3 . | . 6 . ------+-------+------ 2 . . | . . 7 | . 8 . . . 4 | . 1 . | 5 . . . 8 . | 6 . . | . . 7 ------+-------+------ . 2 . | . 7 3 | 4 . 6 . . . | . 6 . | . 7 1 4 . . | . . 1 | 8 . . puzzle #59 (daj95376) . 6 4 | . 1 . | . . . . 2 9 | 5 . 6 | . . 4 7 . . | . 2 3 | . . . ------+-------+------ 6 . . | . . 7 | . . 3 . . 3 | . 6 . | 5 . . 9 . . | 3 . . | . . 7 ------+-------+------ . . . | 1 9 . | . . 6 4 . . | 7 . 2 | 9 3 . . . . | . 3 . | 7 1 . puzzle #60 (daj95376) 1 7 . | . . 3 | 4 . . . 4 . | . . 7 | 3 . . . . 6 | . 9 . | . 1 . ------+-------+------ 2 . . | 8 . 9 | 1 . 6 . . . | . 6 . | . . . 8 . 7 | 3 . 1 | . . 4 ------+-------+------ . 9 . | . 1 . | 7 . . . . 3 | 7 . . | . 9 . . . 1 | 9 . . | . 4 2 puzzle #61 (daj95376) . . . | . . 8 | 2 7 . . 2 . | . . . | . . 3 8 . . | . 3 1 | . . . ------+-------+------ 2 5 6 | 8 . . | . . . . 3 . | . . . | . 5 . . . . | . . 3 | 9 8 2 ------+-------+------ . . . | 6 7 . | . . 5 1 . . | . . . | . 2 . . 6 2 | 3 . . | . . . puzzle #62 (daj95376) . . 8 | 2 6 . | 7 . . . 1 . | . . . | . 2 . 4 . 6 | . . 7 | . 8 . ------+-------+------ 1 6 4 | . . . | 8 . . . . . | . 8 . | . . . . . 9 | . . . | 4 1 7 ------+-------+------ . 9 . | 6 . . | 2 . 5 . 8 . | . . . | . 4 . . . 2 | . 1 5 | 9 . . puzzle #64 (ab) . 5 . | . 6 . | . 9 . . . . | . . . | . . 7 . . 9 | 2 . 4 | 3 . . ------+-------+------ . . 7 | . 1 3 | 8 . . 4 . . | 6 . 2 | . . 1 . . 5 | 8 4 . | 9 . . ------+-------+------ . . 2 | 7 . 8 | 4 . . 3 . . | . . . | . . . . 7 . | . 2 . | . 5 . puzzle #65 (gsf) . . 9 | . 5 . | . 8 . . . 3 | . . 1 | 2 . . 7 . . | 2 . . | . . 1 ------+-------+------ 1 . . | 8 . . | 3 4 5 . . . | . . . | . . . 6 . . | 4 . . | 9 1 2 ------+-------+------ 8 . . | 6 . . | . . 4 . . 7 | . . 9 | 8 . . . . 6 | . 4 . | . 2 . puzzle #66 (daj95376) 8 . . | 3 . . | 7 1 . . . . | . . . | 4 . 5 7 . . | 6 . 4 | . 3 . ------+-------+------ . 5 . | 7 . . | . . . 4 . . | . 5 . | . . 7 . . . | . . 1 | . 8 . ------+-------+------ . 4 . | 5 . 6 | . . 2 2 . 3 | . . . | . . . . 7 6 | . . 8 | . . 4 puzzle #67 (daj95376) 2 4 . | 9 . . | . 3 5 . . . | 5 . . | 2 8 . 5 . 6 | . 1 . | . . 9 ------+-------+------ . . . | . 4 5 | . 6 3 . . . | . . . | . . . 6 3 . | 8 9 . | . . . ------+-------+------ 3 . . | . 2 . | 5 . 4 . 5 2 | . . 8 | . . . 1 9 . | . . 3 | . 2 8 puzzle #68 (daj95376) . . 5 | . . . | 3 . . 9 . . | . 2 . | . 8 7 . . . | . . 1 | . . . ------+-------+------ 2 5 . | . 1 . | 7 9 . 4 . . | . 7 . | . . 2 . 8 3 | . 9 . | . 5 1 ------+-------+------ . . . | 7 . . | . . . 3 9 . | . 4 . | . . 8 . . 4 | . . . | 2 . . puzzle #69 (daj95376) . 3 2 | 8 . . | 6 9 . . . 9 | . 5 . | . . 1 . 8 . | . . 9 | . . . ------+-------+------ . 5 . | 2 . . | 7 . . 9 . . | . 6 . | . . 2 . . 7 | . . 3 | . 5 . ------+-------+------ . . . | 5 . . | . 3 . 8 . . | . 2 . | 5 . . . 2 5 | . . 7 | 1 6 . puzzle #70 (daj95376) . 7 . | 1 . 2 | 9 . . . 5 6 | 3 . . | . . . 2 . . | . . . | . 3 6 ------+-------+------ . 3 . | . . 6 | 2 . . 7 . . | . 4 . | . . 3 . . 9 | 5 . . | . 6 . ------+-------+------ 5 4 . | . . . | . . 1 . . . | . . 5 | 3 7 . . . 3 | 6 . 4 | . 5 . puzzle #71 (daj95376) 7 . . | . . . | 8 . . . 6 . | 8 . . | 2 . 9 . 9 . | . 4 . | . 7 1 ------+-------+------ 4 . 2 | 6 . . | . . . . 1 . | 7 . 5 | . 9 . . . . | . . 4 | 6 . 2 ------+-------+------ 6 5 . | . 7 . | . 4 . 1 . 7 | . . 9 | . 2 . . . 9 | . . . | . . 7 puzzle #72 (ab) . 3 7 | . 6 . | 9 1 . . . . | . . . | . . . . . 5 | 7 . 8 | 2 . . ------+-------+------ . 9 . | 2 . 6 | . . . 5 . . | . 8 . | . . 4 . . . | 1 . 4 | . 3 . ------+-------+------ . . 6 | 8 . 9 | 4 . . . . . | . . . | . . . . 2 9 | . 1 . | 8 6 . puzzle #73 (daj95376) . . . | . 4 . | 7 . . . 4 . | 7 . . | 6 3 . . . 1 | 6 . 9 | . . 4 ------+-------+------ 7 . . | 3 8 . | 9 . . . 8 . | . . . | . 6 . . . 3 | . 9 6 | . . 7 ------+-------+------ 4 . . | 5 . 8 | 3 . . . 3 7 | . . 4 | . 5 . . . 8 | . 1 . | . . . puzzle #74 (daj95376) . . 4 | . 1 . | . 8 . 2 . . | 6 . . | . . . 5 . 1 | . 2 . | . . . ------+-------+------ 6 7 . | . . 9 | . 1 . . . . | 7 6 2 | . . . . 2 . | 5 . . | . 9 7 ------+-------+------ . . . | . 9 . | 7 . 5 . . . | . . 6 | . . 8 . 1 . | . 8 . | 9 . . puzzle #75 (daj95376) . . 5 | . . . | 3 . . 9 . . | . 2 . | . . 7 . . . | 3 . . | 9 2 . ------+-------+------ . 5 6 | 4 . . | . 9 3 . . . | . 7 . | . . . 7 8 . | . . 6 | 4 5 . ------+-------+------ . 6 8 | . . 2 | . . . 3 . . | . 4 . | . . 8 . . 4 | . . . | 2 . . puzzle #76 (daj95376) 7 . . | . 4 6 | . 5 . . 1 3 | . . . | . . . . 6 4 | . . . | . . 3 ------+-------+------ . . . | 6 . 2 | . 9 . 9 . 6 | . 7 . | 2 . 1 . 2 . | 1 . 9 | . . . ------+-------+------ 3 . . | . . . | 4 1 . . . . | . . . | 5 7 . . 5 . | 9 1 . | . . 6 puzzle #77 (daj95376) . . . | 2 . 1 | 7 . . 2 . 3 | 5 . . | . . . 7 . 9 | . 3 . | . . 5 ------+-------+------ . . . | . . 6 | 2 . . . 5 . | . . . | . 6 . . . 2 | 8 . . | . . . ------+-------+------ 8 . . | . 2 . | 5 . 9 . . . | . . 5 | 1 . 8 . . 1 | 9 . 7 | . . . puzzle #78 (daj95376) . 4 . | . . . | 1 9 . . . . | . 4 2 | . . 7 . . . | . . 7 | 5 . . ------+-------+------ . . 2 | 4 . . | . . 8 . 6 . | 2 9 1 | . 5 . 4 . . | . . 8 | 2 . . ------+-------+------ . . 9 | 5 . . | . . . 8 . . | 6 7 . | . . . . 7 5 | . . . | . 8 . puzzle #79 (daj95376) 1 . . | 8 6 . | 3 . . 3 4 . | 7 . 2 | . . . . . 8 | . 3 9 | . 1 . ------+-------+------ . 3 . | . . . | . 7 9 . . 4 | . . . | 6 . . 7 9 . | . . . | . 4 . ------+-------+------ . 8 . | 6 7 . | 1 . . . . . | 9 . 1 | . 2 7 . . 7 | . 2 3 | . . 8 puzzle #80 (daj95376) 2 . . | . 4 . | . . 5 5 9 8 | 7 . . | 3 . . . 4 . | . 5 8 | 9 . . ------+-------+------ . 3 . | 8 . . | 4 . . . 7 . | . . . | . 3 . . . 5 | . . 2 | . 9 . ------+-------+------ . . 9 | 2 6 . | . 4 . . . 4 | . . 9 | 6 7 3 6 . . | . 8 . | . . 9 puzzle #81 (ab) . 3 1 | . . . | 7 2 . . . . | 9 . 8 | 6 . . . . . | . 7 . | . . . ------+-------+------ . 5 . | . . . | . 4 . . . 2 | 7 . 6 | 3 . . . 8 . | . . . | . 1 . ------+-------+------ . . . | . 9 . | . . . . . 8 | 5 . 4 | . . . . 6 3 | . . . | 8 9 . puzzle #82 (ab) . . 6 | 9 . 2 | 3 . . . . . | . . . | . . . 2 . . | . 8 . | . . 4 ------+-------+------ 3 . . | . 7 . | . . 1 . . 9 | 5 . 6 | 8 . . 5 . . | . 4 . | . . 6 ------+-------+------ 1 . . | . 6 . | . . 7 . . . | . . . | . . . . . 8 | 2 . 4 | 6 . . puzzle #83 (ab) . . . | . . 7 | 5 2 6 8 . 5 | 2 . . | . . . 7 . . | 4 . . | . . . ------+-------+------ 5 . . | . . . | 8 9 2 . . . | . . . | . . . 6 2 9 | . . . | . . 7 ------+-------+------ . . . | . . 5 | . . 1 . . . | . . 6 | 4 . 8 4 3 6 | 8 . . | . . . puzzle #84 (daj95376) . . . | 1 2 . | . 8 . . . . | . . 8 | 7 . . . . 6 | . 3 . | 2 . 5 ------+-------+------ . 5 . | . . 2 | . 7 . . . 2 | . 7 . | 3 . . . 3 . | 8 . . | . 4 . ------+-------+------ 8 . 7 | . 1 . | 4 . . . . 3 | 4 . . | . . . . 2 . | . 6 5 | . . . puzzle #85 (daj95376) . . 5 | . 2 . | 6 8 . . . . | 6 . . | . . . . . . | 9 . 7 | 2 . . ------+-------+------ . 5 8 | . . . | . 7 . . 4 2 | . 7 . | 3 6 . . 3 . | . . . | 5 4 . ------+-------+------ . . 7 | 2 . 3 | . . . . . . | . . 9 | . . . . 2 4 | . 6 . | 8 . . puzzle #86 (daj95376) . 7 5 | . 2 4 | . . . 2 . . | . . . | . . 4 . 8 6 | . . . | . 1 . ------+-------+------ . . 8 | . . 2 | . . . . 4 . | 5 7 1 | . 6 . . . . | 8 . . | 5 . . ------+-------+------ . 9 . | . . . | 4 5 . 5 . . | . . . | . . 7 . . . | 7 6 . | 8 9 . puzzle #87 (daj95376) 3 . . | . . . | . 8 9 . 1 . | 6 . . | . . . . . 6 | . . 7 | 2 . . ------+-------+------ 6 . . | 3 4 . | . 7 . 9 . 2 | . 7 . | 3 . 8 . 3 . | . 9 6 | . . 2 ------+-------+------ . . 7 | 2 . . | 4 . . . . . | . . 9 | . 2 . 1 2 . | . . . | . . 3 puzzle #88 (daj95376) 3 . 5 | . 2 . | . . . . 1 9 | . 5 8 | . . 4 . . . | 9 . . | . . . ------+-------+------ . . 8 | . . . | 9 . . 9 4 . | 5 . 1 | . 6 8 . . 1 | . . . | 5 . . ------+-------+------ . . . | . . 3 | . . . 5 . . | 4 8 . | 1 2 . . . . | . 6 . | 8 . 3 puzzle #89 (daj95376) . . . | 4 . . | 8 . . 1 . 6 | . . . | . . 4 9 . . | . 6 . | 2 1 3 ------+-------+------ . . . | 1 . 3 | . 2 . 3 2 . | . 4 . | . 6 7 . 7 . | 6 . 2 | . . . ------+-------+------ 7 9 3 | . 1 . | . . 2 8 . . | . . . | 1 . 9 . . 4 | . . 6 | . . . puzzle #90 (daj95376) . . 6 | . . 2 | . . . 3 . 2 | 7 1 . | . 4 . 8 . . | . . . | 2 . 7 ------+-------+------ 7 . 9 | 2 . . | . 1 . . . . | . 4 . | . . . . 1 . | . . 7 | 3 . 9 ------+-------+------ 9 . 7 | . . . | . . 3 . 4 . | . 9 8 | 7 . 6 . . . | 4 . . | 1 . . puzzle #91 (daj95376) . 5 . | . 4 . | 1 . 6 . 4 . | 5 . . | . . . 8 . 1 | 7 . 9 | . . . ------+-------+------ 3 . 4 | 9 . . | . 1 . . . . | . . . | . . . . 1 . | . . 6 | 4 . 8 ------+-------+------ . . . | 3 . 8 | 6 . 4 . . . | . . 1 | . 9 . 4 . 8 | . 9 . | . 3 . puzzle #92 (daj95376) 5 . 3 | . 1 . | . . . . 6 2 | 5 . 9 | . . . 9 . . | . 2 . | 7 . . ------+-------+------ . . 1 | . . . | . . 5 . 9 . | 3 5 2 | . 1 . 6 . . | . . . | 2 . . ------+-------+------ . . 7 | . 6 . | . . 2 . . . | 1 . 5 | 4 6 . . . . | . 4 . | 9 . 1 puzzle #93 (daj95376) 8 . 3 | . . . | . . 9 1 . . | 2 . . | . . . . 7 . | . 1 . | 5 . . ------+-------+------ . 2 8 | 4 . . | . 7 . . . . | 5 9 8 | . . . . 4 . | . . 2 | 8 9 . ------+-------+------ . . 5 | . 2 . | . 8 . . . . | . . 9 | . . 2 4 . . | . . . | 7 . 6 puzzle #94 (daj95376) . . 8 | . 1 2 | 5 . . 3 . 1 | 4 6 . | . 2 . 5 . . | 8 . . | . . 1 ------+-------+------ 8 . . | 5 . . | . . . . 3 2 | . . . | 6 5 . . . . | . . 6 | . . 8 ------+-------+------ 4 . . | . . 3 | . . 5 . 8 . | . 5 1 | 2 . 4 . . 5 | 9 8 . | 1 . . puzzle #95 (ab) 3 . 4 | 2 . 7 | 8 . 9 . . . | 9 . 5 | . . . . . . | . . . | . . . ------+-------+------ 7 . 9 | . . . | 5 . 8 . . . | . . . | . . . 2 . 8 | . . . | 3 . 4 ------+-------+------ . . . | . 7 . | . . . . 7 . | 6 . 9 | . 3 . 9 . 3 | 8 . 4 | 7 . 2 puzzle #96 (Tarek) . . 7 | . . 1 | . . 8 . 5 . | . 3 . | . 2 . . . . | . . . | 7 . . ------+-------+------ . . 9 | . . 2 | . . 6 . 3 . | . 9 . | . 5 . 6 . . | 3 . . | 1 . . ------+-------+------ . . 1 | . . . | . . . . 6 . | . 4 . | . 9 . 7 . . | 8 . . | 3 . .

I know Tarek was thinking of starting another thread, I hope my starting this thread doesn't put him off!

Same list in line format kindly donated by Re'born, who also pointed out that there's no puzzle 63!

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2....38.4..82.....3..4..2.1.65.....972........3....41......6.9....915.......7.5.8 1..93..74.2...7.......1..8.93..4.8...1.....6...6.8..39.7..6.......5...4.59..71..6 9..4..7...6..3..5...1..8..42..8..1...3..4..7...7..9..55..6..2...2..8..9...6..1..3 8..6..4...9..1..3...7..8..56..4..1...1..2..8...8..9..65..9..2...6..3..7...4..5..3 2..4..3...7..8..4...4..7..14..1..2...5..6..3...7..8..95..8..7...6..5..9...1..9..6 9.38...6....6...8.......9.5..23...5.4...6...1.5...78..3.5.......7...3....6...12.9 .....3.655..6..72...6.....323..675.....8.4.....832..976.....1...57..6..831.5..... ..7......53.1....79.1...54....6.7.35..3.5.9..86.3.4....28...3.93....2.74......1.. 6...9.3....7...62..2.....15...5.4...7.......3...1.2...41.....7..36...8....5.6...9 7...4...6.6.....8...43.29....29.41..4...3...9..76.83....51.36...7.....1.9...8...4 .........9..3.2..464.1.8.7971.....28..5...7..42.....9515.9.4.622..5.6..1......... .128...3.7..3....1....61..7..57.6.13..9...7..67.1.59..5..41....3....9..2.4...315. 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by **Red Ed** » Sun Jul 02, 2006 4:13 pm

Here's one I made earlier.

by **Ocean** » Tue Jul 18, 2006 8:14 am

ab wrote:I suggest adding quads to complete the hidden and naked sets and also extending the idea of x wings to include swordfish and jellyfish.

Good initiative, ab!

The first puzzles are very nice, with x-wings, swordfish and quads.
(Your 4 x X-Wing + Hidden Quad is beautiful, Red Ed !)

It seems that puzzles for this thread are not easily found by accident. I remember I had to implement an X-Wing finder for the Superior Thread. Now it seems I have to implement a Swordfish finder and/or a Quad finder. Such things take time, especially when other things also are to be done...

by **gsf** » Wed Jul 19, 2006 6:54 am

1 naked quad, the rest hidden/naked singles, minimal diagonal symmetry

Code: Select all: . . 1 . . 7 . . . . 6 8 . 1 . . . . 4 . . 6 . . . . . . . 4 7 8 . . . 9 6 7 . . . 3 . 2 . . . 5 . . 2 4 . . . . . 9 . 8 . 5 1 . . . . 3 . . 8 . . . . . 6 . 2 . .

1 hidden quad, the rest hidden/naked singles, symmetric minimal diagonal symmetry

Code: Select all: 2 . 4 5 8 . . . . . . 3 . 4 . . . . . 9 . 1 . 6 . . . . . . 3 9 . 2 . . . . . . . 2 . 8 5 8 1 . . . 5 3 . 4 . . . . . . . 5 6 . . . 7 . . 1 . . 5 . . 8 . . . . 2

1 xwing, 1 jellyfish, the rest hidden/naked singles, symmetric minimal antidiagonal symmetry

Code: Select all: . . 8 . . . . . . . . . . . . 5 . 3 3 . . 4 7 . 2 . 6 . . 4 8 . 9 . . . . . 1 . . 6 3 9 . . . . 2 4 . . . . . 8 5 . 2 . . 3 . . . . . 9 . 4 . 7 . 4 6 . . . . 5 .

by **Ocean** » Wed Jul 19, 2006 11:22 pm

Two puzzles with quads:

Code: Select all: # Double diagonal symmetry. 24 clues. # NQ/HQ in column. *-----------* |1..|...|...| |...|.23|4..| |...|54.|.6.| |---+---+---| |..3|..5|.2.| |.78|...|53.| |.4.|6..|9..| |---+---+---| |.8.|.62|...| |..2|95.|...| |...|...|..7| *-----------* # Double diagonal symmetry. 24 clues. # NQ/HQ in empty box. *-----------* |...|1..|.2.| |..3|.45|..6| |.4.|.7.|...| |---+---+---| |2..|...|.8.| |.87|...|45.| |.9.|...|..1| |---+---+---| |...|.5.|.3.| |9..|73.|8..| |.1.|..8|...| *-----------*

by **Ocean** » Thu Jul 20, 2006 11:37 pm

Here is a puzzle that solves with hidden quad in an empty column. It can alternatively be solved with 'Turbot Fish', (called 'Multiple Colors' in 'Simple Sudoku').

Code: Select all: # Hidden Quad. Rotational symmetry. *-----------* |...|..8|13.| |.41|..6|2..| |.5.|...|4..| |---+---+---| |...|...|.8.| |..4|6.5|7..| |.7.|...|...| |---+---+---| |..3|...|.7.| |..5|1..|89.| |.16|9..|...| *-----------*

Here is a puzzle with diagonal symmetry that solves with naked quad in a column (hidden quad counterpart).

Code: Select all: # Naked Quad. Diagonal Symmetry. *-----------* |...|..1|...| |...|.2.|34.| |...|5..|.16| |---+---+---| |..7|...|8..| |.2.|..6|..5| |8..|.3.|7..| |---+---+---| |.6.|4.2|...| |.52|...|..8| |..9|.5.|.3.| *-----------*

Hidden Quads in empty boxes seem to be easy to spot. Here are two examples. In both cases singles-eliminations/pointing bars lead to a hidden quad in the center box.

Code: Select all: # Type II symmetry (90 deg rotation). # Hidden Quad in empty box. *-----------* |.2.|6..|...| |...|9.1|..8| |..3|.4.|1..| |---+---+---| |.7.|...|.64| |..8|...|2..| |53.|...|.7.| |---+---+---| |..9|.1.|7..| |8..|3.5|...| |...|..2|.5.| *-----------*

Code: Select all: # Type II symmetry (90 deg rotation). # Hidden Quad in empty box. *-----------* |41.|.9.|8.3| |...|.2.|..5| |7..|6..|...| |---+---+---| |...|...|9..| |92.|...|.81| |..5|...|...| |---+---+---| |...|..5|..4| |3..|.1.|...| |5.7|.3.|.29| *-----------*

by ab » Fri Jul 21, 2006 4:14 pm

that's great Ocean. How about swordfish and jellyfish now

by **Ocean** » Sat Jul 22, 2006 10:31 am

ab wrote:that's great Ocean. How about swordfish and jellyfish now

Here is a pattern you might recognize:

Code: Select all: # Swordfish # Puzzle modified from 'ab': . . . | . . . | . . . . 4 . | . . . | . 1 . . . 9 | 2 . 6 | 3 . . -------+-------+------- . . 6 | . 1 . | 7 . . . . . | 4 . 5 | . . . . . 7 | . 3 . | 2 . . -------+-------+------- . . 2 | 7 . 9 | 6 . . . 3 . | . . . | . 5 . . . . | . . . | . . .

Two more in the same pattern:

Code: Select all: # Swordfish/triplets/pairs. *-----------* |...|...|...| |.1.|...|.2.| |..3|4.5|6..| |---+---+---| |..4|.1.|3..| |...|7.8|...| |..6|.9.|5..| |---+---+---| |..2|5.6|4..| |.7.|...|.9.| |...|...|...| *-----------* # # Swordfish + X-Wing. *-----------* |...|...|...| |.1.|...|.2.| |..3|4.5|6..| |---+---+---| |..4|.1.|5..| |...|2.7|...| |..8|.6.|3..| |---+---+---| |..6|3.4|8..| |.7.|...|.9.| |...|...|...| *-----------*

Symmetry type V:

Code: Select all: # Swordfish. # 20 clues. Minimal. Rotational symmetry. *-----------* |...|...|...| |...|1.2|3..| |45.|...|.61| |---+---+---| |.4.|...|.1.| |...|2.7|...| |.6.|...|.8.| |---+---+---| |91.|...|.46| |..7|3.8|...| |...|...|...| *-----------*

Symmetry type VII:

Code: Select all: # Swordfish. # 20 clues. Minimal. Double diagonal symmetry. *-----------* |..1|.23|..4| |...|..5|...| |6..|...|7..| |---+---+---| |...|...|.13| |7..|...|..6| |89.|...|...| |---+---+---| |..5|...|..7| |...|4..|...| |1..|79.|4..| *-----------*

Three other Swordfish-puzzles (90 degrees rotational symmetry):
000208600040000010900030000400709006006000500200103004000020007050000060002307000
007000430200008000300050002070040000008506700000030050900020008000400003062000100
340050009005000006002000870000304000700000004000106000083000200600000400900020013

by ab » Sat Jul 22, 2006 7:44 pm

there are some very nice puzzles in that collection Ocean. However I'm beginning to wonder if the number of puzzles contributed by one person should be restricted. Since no one else is playing at the moment, I'll leave it as it is.

We still have no jellyfish puzzles. I have made one I think, but it also requires xy wings or xyz wings which are beyond the scope of this thread.

I don't know about anyone else, but I find these puzzles hard to find. They're much rarer than superior puzzles and my generator takes a few seconds to generate each puzzle, so can take hours to find a superior plus puzzle.

by **gsf** » Sat Jul 22, 2006 8:49 pm

ab wrote:Since no one else is playing at the moment, I'll leave it as it is.

We still have no jellyfish puzzles.

I posted 3 jul 19
1 had a jellyfish (with an x-wing)
I'm limiting my search to
symmetric naked/hidden singles + one of (naked/hidden quad or jellyfish) and nothing else
and the hit rate is low
here is a 28 clue symmetric minimal horizontal symmetry with naked/hidden singles and 1 jellyfish

Code: Select all: 8 . 3 | . 2 . | 7 . . 1 . 6 | 7 8 . | 9 . . . . . | . . 3 | . . . ------+-------+------ 6 . . | . . . | . 7 . . 7 . | 8 6 . | . 1 . 9 . . | . . . | . 5 . ------+-------+------ . . . | . . 9 | . . . 3 . 9 | 4 7 . | 1 . . 4 . 7 | . 1 . | 6 . .

by **daj95376** » Sat Jul 22, 2006 10:16 pm

[Edit:] Unacceptable.

by ab » Sat Jul 22, 2006 11:23 pm

gsf wrote:
ab wrote:Since no one else is playing at the moment, I'll leave it as it is.

We still have no jellyfish puzzles.

I posted 3 jul 19
1 had a jellyfish (with an x-wing)

So you did, my apologies. The take up on this thread has been a bit slow. Maybe people find the effortless extremes more interesting or more of a challenge.

daj95376 wrote:In the Programmers Forum, Ruud has a thread on Techniques. I don't know where he obtained his examples, but I hope it's okay if I submit them in his name.

I get the impression Ruud has quit this forum. I'd prefer people submitted their own puzzles.

by **gsf** » Sun Jul 23, 2006 4:31 am

ab wrote:The take up on this thread has been a bit slow. Maybe people find the effortless extremes more interesting or more of a challenge.

I don't because I haven't coded uniqueness and don't plan to. There's a neverending stream of exceptions and subclauses that gives the impression that its missed some underlying basic principle. I stopped looking (well my solver stopped looking) when every submission was countered by "technique X is really UR type Y".

by RW » Sun Jul 23, 2006 8:45 am

gsf wrote:I don't because I haven't coded uniqueness and don't plan to. There's a neverending stream of exceptions and subclauses that gives the impression that its missed some underlying basic principle. I stopped looking (well my solver stopped looking) when every submission was countered by "technique X is really UR type Y".

I'm sorry gsf if that is the impression you got. As I said several times already, the thread is intended for manual solvers, not coded solvers. I solve all submitted puzzles manually before adding them to the thread, and if there is a UR type Y that solves the puzzle, it's a matter of seconds before I spot it, while a long XY-chain usually takes several minutes to find. In that case I cannot claim that the puzzle requires the XY-chain. The neverending stream of exceptions is just an indication that Uniqueness technique is very common and provides a simpler solution to many puzzles.

In the superior thread tarek wrote:I was thinking of something which is tougher actually, fish & quads however they should be consistant even against the mights of unique rectangles,xy wings & colouring/finned xwing.....

Is there any such consistancy restrictions in this thread? Just wondering because I'm trying to create a superior+ puzzle myself (but it seems to be very hard...).

RW

by ab » Sun Jul 23, 2006 2:50 pm

the only requirement for this thread is that the puzzles are solved by hidden and naked sets, locked candidates, x wings, swordfish and jellyfish and that from that list they have at least one of the following: quads (hidden or naked), swordfish or jellyfish.

Whether they fall to another technique is of no concern. I still think you'll find it hard finding such puzzles, especially if you're making them by hand!

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